Enhance ZoneInfo.from_file stub (#14221)

Enhance ZoneInfo.from_file stub

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

Author: hrimov

stdlib/@tests/stubtest_allowlists/py312.txt

@@ -7,8 +7,6 @@
 # >= 3.12
 # =======
 
-zoneinfo.ZoneInfo.from_file  # Pos-only parameters had different "names" in different Python versions
-
 # Initialized at runtime
 typing_extensions.TypeAliasType.__parameters__
 typing_extensions.TypeAliasType.__value__

stdlib/@tests/stubtest_allowlists/py313.txt

@@ -12,8 +12,6 @@
 # >= 3.12
 # =======
 
-zoneinfo.ZoneInfo.from_file  # Pos-only parameters had different "names" in different Python versions
-
 # Initialized at runtime
 typing_extensions.TypeAliasType.__parameters__
 typing_extensions.TypeAliasType.__value__

stdlib/@tests/stubtest_allowlists/py314.txt

@@ -50,8 +50,6 @@ functools.partialmethod.__new__
 # >= 3.12
 # =======
 
-zoneinfo.ZoneInfo.from_file  # Pos-only parameters had different "names" in different Python versions
-
 # Types that require `__setattr__` and `__delattr__` for typing purposes:
 types.SimpleNamespace.__setattr__
 types.SimpleNamespace.__delattr__

stdlib/zoneinfo/__init__.pyi

@@ -1,3 +1,4 @@
+import sys
 from collections.abc import Iterable
 from datetime import datetime, timedelta, tzinfo
 from typing_extensions import Self
@@ -17,8 +18,13 @@ class ZoneInfo(tzinfo):
     def __new__(cls, key: str) -> Self: ...
     @classmethod
     def no_cache(cls, key: str) -> Self: ...
-    @classmethod
-    def from_file(cls, fobj: _IOBytes, /, key: str | None = None) -> Self: ...
+    if sys.version_info >= (3, 12):
+        @classmethod
+        def from_file(cls, file_obj: _IOBytes, /, key: str | None = None) -> Self: ...
+    else:
+        @classmethod
+        def from_file(cls, fobj: _IOBytes, /, key: str | None = None) -> Self: ...
+
     @classmethod
     def clear_cache(cls, *, only_keys: Iterable[str] | None = None) -> None: ...
     def tzname(self, dt: datetime | None, /) -> str | None: ...